|#|Name|Took Office|Left Office|Party|
|---|---|---|---|---|
|1|Nejat Konuk, 2nd time|15 November 1983|19 July 1985|National Unity Party|
|2|Derviş Eroğlu, 1st time|19 July 1985|1 January 1994|National Unity Party|
|3|Hakkı Atun|1 January 1994|16 August 1996|Democratic Party|
|(2)|Derviş Eroğlu, 2nd time|16 August 1996|13 January 2004|National Unity Party|
|4|Mehmet Ali Talat|13 January 2004|26 April 2005|Republican Turkish Party|
|5|Ferdi Sabit Soyer|26 April 2005|5 May 2009|Republican Turkish Party|
|(2)|Derviş Eroğlu, 3rd time|5 May 2009|23 April 2010|National Unity Party|
|—|Hüseyin Özgürgün (acting)|23 April 2010|17 May 2010|National Unity Party|
|6|İrsen Küçük|17 May 2010|13 June 2013|National Unity Party|
|7|Sibel Siber|13 June 2013|2 September 2013|Republican Turkish Party|
|8|Özkan Yorgancıoğlu|2 September 2013|Incumbent|Republican Turkish Party|

Question: at least how many parties have won?
Answer: 3